adding callback to function - always

Question

I found myself using a weird way to add callback functions to my functions and I was wondering if there is a more generic way to add callbacks to functions, best case I would ha

Answer 1

I prefer a formal parameter:

var myFunc = function(obj, callback) {
   ...
}

This way it makes it obvious that there is a callback. You also don't have to mess around with the arguments object; you can just check to see if callback is undefined, and then check to see if it is of the appropriate type (Function).